Thanks to Wikipedia:

Yankee Doodle

The song originated from British military officers to mock disheveled, disorganized colonial "Yankees" during the French and Indian War. British troops liked the song because it created a stereotype of the Yankee oaf trying to look stylish by putting a feather in his cap. Americans added additional verses in turn to mock British troops. The song was popular during the American Revolutionary War (1775–83). Adopted by American patriots after the battles of Lexington and Concord. [https://en.wikipedia.org/wiki/Yankee#Yankee_Doodle

Macaroni

The Macaroni wig was an extreme fashion in the mid-18th-century England. A macaroni (or maccaroni) was the term for a fashionable fellow. Maccaroni's spoke outlandishly and dressed characteristically of indeterminate sex as an "epicene," completely un-gender-biased. The term referred to a man who "exceeded the ordinary bounds of fashion," men who adopted feminine behavior, demeanor, or dress; androgyny – having both masculine and feminine characteristics. A macaroni dressed with long curls and spying-glasses, powdered wigs with chapeau bras on top.

These young men developed a taste for Italian maccaroni, a type of pasta little known in England at the time and as a result were said to belong to the Macaroni Club. All things fashionable or à la mode was referred to as "very maccaroni". The Italian term maccherone, figuratively means "blockhead, fool." https://en.wikipedia.org/wiki/Macaroni_(fashion)

Doodle

Doodle first appeared in English in the early seventeenth century, derived from the Low German word "dudel" which meant to "play music badly", or Dödel, which meant "fool" or "simpleton".Dandies were men who placed particular importance upon physical appearance, refined language, and leisure hobbies. A self-made dandy was a British middle-class man who impersonated an aristocratic lifestyle. They notably wore silk strip cloth, stuck feathers in their hats, and carried two pocket watches with chains—"one to tell what time it was and the other to tell what time it was not"